Steam heating device of liquid ammonia evaporator

Abstract

The utility model relates to the technical field of liquid ammonia evaporation, in particular to a steam heating device of a liquid ammonia evaporator, which comprises a treatment tank body and further comprises a heat exchange assembly arranged on the outer side of a second annular seat and used for improving the heat exchange efficiency between liquid ammonia and steam. The steam inlet assembly is arranged at the bottom of the inner cavity of the treatment tank body and facilitates input of external steam. Liquid ammonia is input into the spiral heat exchange pipe through the liquid ammonia inlet pipe and the first collecting pipe, steam is input into the treatment tank body through the steam inlet assembly, and multiple strands of liquid ammonia can make full contact with the steam in the process of flowing from the top end of the spiral heat exchange pipe to the bottom end of the spiral heat exchange pipe; the contact area and the contact time of liquid ammonia and steam can be greatly increased and prolonged by matching with a heat conducting plate, and the extraction efficiency of gaseous ammonia is effectively improved; loss of steam heat can be effectively slowed down through the heat preservation assembly, and waste of resources is avoided; and through the threaded columns, the fastening nuts and the positioning holes, the heat exchange assembly can be conveniently disassembled, maintained and overhauled.

Description

Technical Field

[0001] This utility model relates to the field of liquid ammonia evaporator technology, specifically to a steam heating device for a liquid ammonia evaporator. Background Technology

[0002] A liquid ammonia evaporator is a device used to evaporate ammonia gas from liquid ammonia. Its working principle is based on the phase change process between gas and liquid. It has two types: electric heating type and electric heating water bath type. Liquid ammonia is heated in the evaporation chamber, so that some liquid ammonia molecules have enough energy to overcome the surface tension and jump out of the liquid surface to form gaseous ammonia molecules. By precisely controlling the evaporation process, liquid ammonia can be rapidly converted into gaseous state to meet different application requirements.

[0003] In existing liquid ammonia evaporators, the steam heating device typically involves the operator introducing liquid ammonia into a single or paired heat exchange tube through an interface on one side of the evaporation chamber. Steam is then introduced into the evaporation chamber, bringing it into contact with the heat exchange tubes. This process causes gaseous ammonia molecules to evaporate from the liquid ammonia. However, since heat exchange efficiency is directly proportional to the contact area between the heat exchange tubes and the steam, the small contact area and short contact time of a single or paired heat exchange tube reduce the evaporation efficiency of the liquid ammonia and affect the ammonia production. Utility Model Content

[0004] The purpose of this invention is to provide a steam heating device for a liquid ammonia evaporator to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a steam heating device for a liquid ammonia evaporator, comprising a processing tank, a hollow jacket on the outer side of the processing tank, a first annular seat fixedly connected to the bottom edge of the hollow jacket, multiple support pillars symmetrically installed at the bottom of the first annular seat, each support pillar having an anti-slip pad fixedly connected to its bottom end, a drain outlet at the bottom of the inner cavity of the processing tank, an electromagnetic valve installed inside the drain outlet, and a second annular seat fixedly connected to the top of the inner cavity of the processing tank, further comprising:

[0006] A heat exchange component is provided on the outside of the second annular seat to improve the heat exchange efficiency between liquid ammonia and steam. The hollow interlayer is provided with a heat insulation component to slow down the rate of heat loss inside the treatment tank.

[0007] A steam inlet assembly is installed at the bottom of the inner cavity of the processing tank to facilitate the input of external steam. A sealing top cover is installed at the top opening of the processing tank. A steam exhaust pipe is connected to the top of the sealing top cover, and a condensate outlet pipe is connected to the bottom of the drain outlet.

[0008] Preferably, the heat exchange assembly includes a first support plate disposed on the top of the second annular seat, a second support plate disposed below the first support plate, and at least two spiral heat exchange tubes disposed between the first and second support plates. The spiral heat exchange tubes are concentrically arranged and nested together from large to small. Multiple heat-conducting plates are symmetrically disposed on the outer side of each spiral heat exchange tube. The heat-conducting plates are respectively connected to the first and second support plates. The spiral heat exchange tubes are fixedly mounted on the heat-conducting plates. Openings are provided on the outer side of both the first and second support plates. A first manifold is disposed below the first support plate. The top end of the spiral heat exchange tube is connected to the first manifold. A liquid ammonia inlet pipe is fixedly connected to the top end of the first manifold. One end of the liquid ammonia inlet pipe extends to the outside of the processing tank. A second manifold is disposed above the second support plate. The bottom end of the spiral heat exchange tube is connected to the second manifold.

[0009] Preferably, the top of the second annular seat is provided with multiple threaded posts, which are parallel to the axis of the second annular seat. The multiple threaded posts are distributed equidistantly along the outer circumference of the second annular seat. The outer side of the first support plate is provided with positioning holes corresponding to the threaded posts. The bottom end of the threaded post is connected to the second annular seat, and the top end of the threaded post extends through to the outside of the positioning hole and is screwed with a fastening nut.

[0010] Preferably, a gas-liquid separator is provided below the second support plate, the bottom end of the second manifold is connected to the feed port of the gas-liquid separator, the gas outlet of the gas-liquid separator is connected to an ammonia outlet pipe, one end of the ammonia outlet pipe extends through to the outside of the processing tank, and the liquid outlet of the gas-liquid separator is connected to a liquid ammonia outlet pipe, one end of the liquid ammonia outlet pipe extends through to the outside of the processing tank.

[0011] Preferably, the insulation component includes an insulation layer disposed on one side of the inner wall of the hollow sandwich layer, and a heat insulation layer is provided on one side of the insulation layer. The heat insulation layer is made of rock wool or foam glass material, and the insulation layer is made of polyurethane foam material.

[0012] Preferably, the steam inlet assembly includes a steam inlet pipe fixed to the bottom of the inner cavity of the processing tank, the bottom of the steam inlet pipe having a steam outlet, and one end of the steam inlet pipe extending to the outside of the processing tank.

[0013] Preferably, a safety valve is installed on the top of one side of the sealed top cover, and the air inlet at the bottom of the safety valve is connected to the inside of the treatment tank.

[0014] Preferably, an inspection hole is provided on one side of the processing tank, and a sealing cover is installed at one end of the inspection hole.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention introduces liquid ammonia into the spiral heat exchange tube via a liquid ammonia inlet pipe and a first manifold. Steam is then introduced into the processing tank using a steam inlet assembly. As multiple streams of liquid ammonia flow from the top to the bottom of the spiral heat exchange tube, they come into full contact with the steam. Combined with a heat-conducting plate, this significantly increases the contact area and time between the liquid ammonia and steam, ensuring thorough heat exchange and effectively improving the extraction efficiency of gaseous ammonia. The insulation component effectively reduces heat loss from the steam, preventing resource waste. The threaded post, fastening nut, and positioning hole facilitate disassembly, maintenance, and repair of the heat exchange assembly, enhancing its practicality. Attached Figure Description

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the processing tank of this utility model;

[0019] Figure 3 This is a schematic diagram of the thermal insulation component structure of this utility model;

[0020] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0021] Figure 5 This is a schematic diagram of the heat exchange component structure of this utility model.

[0022] In the diagram: 1. Processing tank; 2. Hollow jacket; 3. First annular seat; 4. Support column; 5. Anti-slip pad; 6. Sealed top cover; 7. Steam inlet assembly; 71. Steam inlet pipe; 72. Steam outlet; 8. Exhaust pipe; 9. Drain outlet; 10. Condensate outlet pipe; 11. Inspection hole; 12. Sealing cover plate; 13. Safety valve; 14. Heat exchange assembly; 141. First support plate; 142. Second support plate; 143. Spiral heat exchange tube; 144. Heat-conducting plate; 145. First manifold; 146. Liquid ammonia inlet pipe; 147. Second manifold; 148. Port; 15. Gas-liquid separator; 16. Ammonia outlet pipe; 17. Liquid ammonia outlet pipe; 18. Insulation assembly; 181. Insulation layer; 182. Heat insulation layer; 19. Second annular seat; 20. Threaded column; 21. Fastening nut; 22. Positioning hole. Detailed Implementation

[0023] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0024] Please see Figure 1-5As shown, a steam heating device for a liquid ammonia evaporator includes a processing tank 1, a hollow jacket 2 on the outside of the processing tank 1, a first annular seat 3 fixedly connected to the bottom edge of the hollow jacket 2, multiple support pillars 4 symmetrically installed at the bottom of the first annular seat 3, and an anti-slip pad 5 fixedly connected to the bottom end of each support pillar 4, a drain outlet 9 at the bottom of the inner cavity of the processing tank 1, a solenoid valve installed inside the drain outlet 9, and a second annular seat 19 fixedly connected to the top of the inner cavity of the processing tank 1. The device also includes a heat exchange component 14 disposed outside the second annular seat 19 to improve the heat exchange efficiency between liquid ammonia and steam. By setting the heat exchange component 14, the contact area and contact time between steam and liquid ammonia can be increased, thus effectively improving the extraction efficiency of gaseous ammonia. The hollow jacket 2 contains a structure that can slow down the heat inside the processing tank 1. The heat dissipation rate-reducing insulation component 18 effectively slows down the heat exchange rate between the steam inside the treatment tank 1 and the external air, thus preventing heat loss and resource waste. The steam inlet component 7, located at the bottom of the inner cavity of the treatment tank 1, facilitates the input of external steam. It can be connected to the output end of an external steam boiler, allowing external steam to enter the treatment tank 1 and promoting the extraction of gaseous ammonia. A sealing top cover 6 is installed at the top opening of the treatment tank 1. The top of the sealing top cover 6 is connected to a steam exhaust pipe 8, and the bottom of the drain outlet 9 is connected to a condensate outlet pipe 10. By setting the condensate outlet pipe 10, the steam can be quickly discharged from the inside of the treatment tank 1 after releasing heat and turning into liquid, thus preventing condensate from participating in the heat exchange process of liquid ammonia and affecting the extraction of gaseous ammonia.

[0025] The heat exchange assembly 14 includes a first support plate 141 disposed on the top of the second annular seat 19, a second support plate 142 disposed below the first support plate 141, and at least two spiral heat exchange tubes 143 disposed between the first support plate 141 and the second support plate 142. The spiral heat exchange tubes 143 are concentrically arranged and nested together from large to small. Multiple heat-conducting plates 144 are symmetrically disposed on the outer side of the spiral heat exchange tubes 143. The heat-conducting plates 144 are respectively connected to the first support plate 141 and the second support plate 142. The spiral heat exchange tubes 143 are fixedly mounted on the heat-conducting plates 144. It should be noted that... The heat-conducting plate 144 can be made of copper, steel, or aluminum, all of which have good thermal conductivity and are sufficiently robust. Openings 148 are provided on the outer sides of both the first support plate 141 and the second support plate 142. A first manifold 145 is located below the first support plate 141. The top end of the spiral heat exchanger tube 143 is connected to the first manifold 145. A liquid ammonia inlet pipe 146 is fixedly connected to the top end of the first manifold 145, with one end of the liquid ammonia inlet pipe 146 extending to the outside of the processing tank 1. A second manifold 147 is located above the second support plate 142. The bottom end of the spiral heat exchanger tube 143 is connected to the second manifold 147. Figure 3 , Figure 5As shown, by setting multiple concentric and nested spiral heat exchange tubes 143, the liquid ammonia entering from the liquid ammonia inlet pipe 146 and the first manifold pipe 145 can be divided into multiple streams. As the multiple streams of liquid ammonia flow from the top to the bottom of the spiral heat exchange tubes 143, they will fully contact the steam. This can greatly increase the contact area and contact time between the liquid ammonia and the steam, so that the liquid ammonia can fully exchange heat with the steam, effectively improving the extraction efficiency of gaseous ammonia. Furthermore, the heat-conducting plate 144 can support the spiral heat exchange tubes 143 on the one hand, and the steam can pass through the opening 148 between the heat-conducting plates 144 on the other hand, which further increases the contact area between the liquid ammonia and the steam.

[0026] The top of the second annular seat 19 is provided with multiple threaded posts 20, which are parallel to the axis of the second annular seat 19. The multiple threaded posts 20 are evenly distributed circumferentially along the outer side of the second annular seat 19. The outer side of the first support plate 141 has positioning holes 22 corresponding to the threaded posts 20. The bottom end of the threaded post 20 is connected to the second annular seat 19, and the top end of the threaded post 20 extends through to the outside of the positioning hole 22 and is screwed with a fastening nut 21. Figure 3 , Figure 4 As shown, by setting threaded post 20, fastening nut 21 and positioning hole 22, the heat exchange component 14 can be disassembled, maintained and repaired, which improves its practicality.

[0027] A gas-liquid separator 15 is located below the second support plate 142. The bottom end of the second manifold 147 is connected to the inlet of the gas-liquid separator 15. The gas outlet of the gas-liquid separator 15 is connected to an ammonia outlet pipe 16, one end of which extends to the outside of the processing tank 1. The liquid outlet of the gas-liquid separator 15 is connected to a liquid ammonia outlet pipe 17, one end of which also extends to the outside of the processing tank 1. Figure 3 As shown, after the liquid ammonia reaches the bottom of the spiral heat exchange tube 143, it is introduced into the gas-liquid separator 15 through the second manifold 147. The gas-liquid separator 15 will output the gaseous ammonia and the incompletely evaporated liquid ammonia to the outside of the processing tank 1 through the ammonia outlet pipe 16 and the liquid ammonia outlet pipe 17, respectively. The incompletely evaporated liquid ammonia can be reintroduced into the spiral heat exchange tube 143 through the pipeline for heat exchange again, thereby avoiding the occurrence of incomplete evaporation.

[0028] The insulation component 18 includes an insulation layer 181 disposed on one side of the inner wall of the hollow interlayer 2, and a heat insulation layer 182 disposed on one side of the insulation layer 181. The heat insulation layer 182 is made of rock wool or foam glass, and the insulation layer 181 is made of polyurethane foam. Figure 3 , Figure 4 As shown, by setting up the insulation layer 181 and the heat insulation layer 182, the loss of steam heat can be effectively slowed down, thus avoiding the waste of resources.

[0029] Steam inlet assembly 7 includes a steam inlet pipe 71 fixed to the bottom of the inner cavity of the processing tank 1. A steam outlet 72 is provided at the bottom of the steam inlet pipe 71, and one end of the steam inlet pipe 71 extends to the outside of the processing tank 1. Figure 2 , Figure 3 As shown, the steam inlet pipe 71 is connected to the output end of an external steam boiler, and the steam is then input into the processing tank 1 through the steam outlet 72. This facilitates subsequent heat exchange. The steam outlet 72 is located at the bottom of the steam inlet pipe 71, which prevents condensate from falling into the steam inlet pipe 71 and affecting the steam input.

[0030] A safety valve 13 is installed on the top side of one side of the sealed top cover 6. The air inlet at the bottom of the safety valve 13 is connected to the inside of the treatment tank 1. Figure 2 As shown, by setting up safety valve 13, when the internal pressure of the processing tank 1 is too high, safety valve 13 will open and release the internal pressure of the processing tank 1, thus avoiding damage to the mechanical structure of the processing tank 1 and improving safety.

[0031] A maintenance hole 11 is provided on one side of the treatment tank 1, and a sealing cover 12 is installed at one end of the maintenance hole 11, such as... Figure 2 As shown, by providing the inspection hole 11, it is convenient to clean, maintain and repair the inside of the treatment tank 1, and also ensure the normal operation of each component.

[0032] Working principle: First, the operator introduces liquid ammonia into the spiral heat exchange tube 143 through the liquid ammonia inlet pipe 146 and the first manifold 145. Then, the steam is introduced into the processing tank 1 using the steam inlet assembly 7. As multiple streams of liquid ammonia flow from the top to the bottom of the spiral heat exchange tube 143, they come into full contact with the steam. With the help of the heat conduction plate 144, the contact area and contact time between the liquid ammonia and the steam are greatly increased, allowing the liquid ammonia to fully exchange heat with the steam and effectively improving the extraction efficiency of gaseous ammonia. During this process, the heat insulation assembly 18 can effectively slow down the loss of steam heat and avoid waste of resources. Furthermore, the threaded column 20, fastening nut 21, and positioning hole 22 facilitate the disassembly, maintenance, and repair of the heat exchange assembly 14, improving its practicality.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A steam heating device for a liquid ammonia evaporator, comprising a processing tank (1), characterized in that, The processing tank (1) has a hollow interlayer (2) on its outer side. A first annular seat (3) is fixedly connected to the bottom edge of the hollow interlayer (2). Multiple support columns (4) are symmetrically installed at the bottom of the first annular seat (3). Anti-slip pads (5) are fixedly connected to the bottom end of each support column (4). A drain outlet (9) is provided at the bottom of the inner cavity of the processing tank (1). A solenoid valve is installed inside the drain outlet (9). A second annular seat (19) is fixedly connected to the top of the inner cavity of the processing tank (1). The tank also includes: A heat exchange component (14) is provided on the outside of the second annular seat (19) to improve the heat exchange efficiency between liquid ammonia and steam. The hollow jacket (2) is provided with a heat insulation component (18) to slow down the rate of heat loss inside the treatment tank (1). A steam inlet assembly (7) is installed at the bottom of the inner cavity of the treatment tank (1) to facilitate the input of external steam. A sealing top cover (6) is installed at the top opening of the treatment tank (1). A steam exhaust pipe (8) is connected to the top of the sealing top cover (6). A condensate outlet pipe (10) is connected to the bottom of the drain outlet (9).

2. The steam heating device for a liquid ammonia evaporator according to claim 1, characterized in that: The heat exchange assembly (14) includes a first support plate (141) disposed on the top of the second annular seat (19), a second support plate (142) disposed below the first support plate (141), and at least two spiral heat exchange tubes (143) disposed between the first support plate (141) and the second support plate (142). The spiral heat exchange tubes (143) are arranged concentrically, and each spiral heat exchange tube (143) is nested and combined with each other from large to small. A plurality of heat-conducting plates (144) are symmetrically disposed on the outer side of the spiral heat exchange tubes (143). The heat-conducting plates (144) are respectively connected to the first support plate (141) and the second support plate (142). (143) is fixedly installed on the heat-conducting plate (144). The outer side of the first support plate (141) and the outer side of the second support plate (142) are provided with openings (148). The first support plate (141) is provided with a first manifold (145) below it. The top end of the spiral heat exchange tube (143) is connected to the first manifold (145). The top end of the first manifold (145) is fixedly connected to a liquid ammonia inlet pipe (146). One end of the liquid ammonia inlet pipe (146) extends through to the outside of the processing tank (1). The second support plate (142) is provided with a second manifold (147) above it. The bottom end of the spiral heat exchange tube (143) is connected to the second manifold (147).

3. The steam heating device for a liquid ammonia evaporator according to claim 2, characterized in that: The second annular seat (19) has multiple threaded posts (20) on its top. The threaded posts (20) are parallel to the axis of the second annular seat (19). The multiple threaded posts (20) are distributed equidistantly along the outer circumference of the second annular seat (19). The first support plate (141) has a positioning hole (22) corresponding to the threaded post (20) on its outer side. The bottom end of the threaded post (20) is connected to the second annular seat (19). The top end of the threaded post (20) extends through to the outside of the positioning hole (22) and is screwed with a fastening nut (21).

4. The steam heating device for a liquid ammonia evaporator according to claim 2, characterized in that: A gas-liquid separator (15) is provided below the second support plate (142). The bottom end of the second manifold (147) is connected to the feed port of the gas-liquid separator (15). The gas outlet of the gas-liquid separator (15) is connected to an ammonia outlet pipe (16). One end of the ammonia outlet pipe (16) extends to the outside of the processing tank (1). The liquid outlet of the gas-liquid separator (15) is connected to a liquid ammonia outlet pipe (17). One end of the liquid ammonia outlet pipe (17) extends to the outside of the processing tank (1).

5. A steam heating device for a liquid ammonia evaporator according to claim 1, characterized in that: The insulation component (18) includes an insulation layer (181) disposed on one side of the inner wall of the hollow interlayer (2), and a heat insulation layer (182) is provided on one side of the insulation layer (181). The heat insulation layer (182) is made of rock wool or foam glass material, and the insulation layer (181) is made of polyurethane foam material.

6. The steam heating device for a liquid ammonia evaporator according to claim 1, characterized in that: The steam inlet assembly (7) includes a steam inlet pipe (71) fixed to the bottom of the inner cavity of the processing tank (1), and a steam outlet (72) is provided at the bottom of the steam inlet pipe (71). One end of the steam inlet pipe (71) extends to the outside of the processing tank (1).

7. A steam heating device for a liquid ammonia evaporator according to claim 1, characterized in that: A safety valve (13) is installed on the top of one side of the sealed top cover (6), and the air inlet at the bottom of the safety valve (13) is connected to the inside of the treatment tank (1).

8. A steam heating device for a liquid ammonia evaporator according to claim 1, characterized in that: The processing tank (1) has an inspection hole (11) on one side, and a sealing cover plate (12) is installed at one end of the inspection hole (11).

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